A member of the Beastie Boys — standing in a Brooklyn park where someone spray-painted swastikas and “Go Trump!” on playground equipment last week — urged city residents to make some noise against hate bias Sunday.

People participate in an anti-hate rally at a Brooklyn park amed in memory of Beastie Boys band member Adam Yauch.Photo: Getty Images

Adam “Ad-Rock” Horovitz took center stage before a crowd of several hundred people at Adam Yauch Park, which is named after his late band member, in Brooklyn Heights.

“These incidents and this type of graffiti have been popping up all over our country because we’ve elected a president that’s given our children the message that it’s OK to write ‘white power’ in their high-school hallways.

That it’s OK to attack to women and girls. That Latinos and Muslims and Jews are bad people and that you can electroshock the gay out of somebody,” said Horovitz, whose hip-hop group is known for songs such as “Make Some Noise.”

“C’mon! This is real,” Horovitz told crowd.

The rally was prompted by the alarming discovery of two swastikas and “Go Trump” spray-painted onto a jungle-gym train in the park Friday.

Similar hateful symbols and messages have popped up around the city since Donald Trump was elected president.